do not replace proto_ip dns servers on config reload

[project/netifd.git] / utils.h

diff --git a/utils.h b/utils.h
index 09df8c6..5b6c5e7 100644 (file)
--- a/utils.h
+++ b/utils.h
@@ -1,20 +1,123 @@
+/*
+ * netifd - network interface daemon
+ * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
 #ifndef __NETIFD_UTILS_H
 #define __NETIFD_UTILS_H
 
 #include <libubox/list.h>
+#include <libubox/avl.h>
+#include <libubox/blobmsg.h>
 
-#ifdef DEBUG
-#define DPRINTF(format, ...) fprintf(stderr, "%s(%d): " format, __func__, __LINE__, ## __VA_ARGS__)
+#ifndef __OPTIMIZE__
+#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
 #else
-#define DPRINTF(format, ...) no_debug(format, ## __VA_ARGS__)
+extern int __build_bug_on_failed;
+#define BUILD_BUG_ON(condition)                                 \
+       do {                                                    \
+               ((void)sizeof(char[1 - 2*!!(condition)]));  \
+               if (condition) __build_bug_on_failed = 1;   \
+       } while(0)
 #endif
 
-static inline void no_debug(const char *fmt, ...)
+static inline bool blobmsg_get_bool_default(struct blob_attr *attr, bool val)
 {
+       if (!attr)
+               return val;
+
+       return blobmsg_get_bool(attr);
 }
 
 #define __init __attribute__((constructor))
 
+struct vlist_tree;
+struct vlist_node;
+
+typedef void (*vlist_update_cb)(struct vlist_tree *tree,
+                               struct vlist_node *node_new,
+                               struct vlist_node *node_old);
+
+struct vlist_tree {
+       struct avl_tree avl;
+
+       vlist_update_cb update;
+       bool keep_old;
+       bool no_delete;
+
+       int version;
+};
+
+struct vlist_node {
+       struct avl_node avl;
+       int version;
+};
+
+void vlist_init(struct vlist_tree *tree, avl_tree_comp cmp, vlist_update_cb update);
+
+#define vlist_find(tree, name, element, node_member) \
+       avl_find_element(&(tree)->avl, name, element, node_member.avl)
+
+static inline void vlist_update(struct vlist_tree *tree)
+{
+       tree->version++;
+}
+
+void vlist_add(struct vlist_tree *tree, struct vlist_node *node, void *key);
+void vlist_delete(struct vlist_tree *tree, struct vlist_node *node);
+void vlist_flush(struct vlist_tree *tree);
+void vlist_flush_all(struct vlist_tree *tree);
+
+#define vlist_for_each_element(tree, element, node_member) \
+       avl_for_each_element(&(tree)->avl, element, node_member.avl)
+
+
+struct vlist_simple_tree {
+       struct list_head list;
+       int head_offset;
+       int version;
+};
+
+struct vlist_simple_node {
+       struct list_head list;
+       int version;
+};
+
+#define vlist_simple_init(tree, node, member) \
+       __vlist_simple_init(tree, offsetof(node, member))
+
+void __vlist_simple_init(struct vlist_simple_tree *tree, int offset);
+void vlist_simple_delete(struct vlist_simple_tree *tree, struct vlist_simple_node *node);
+void vlist_simple_flush(struct vlist_simple_tree *tree);
+void vlist_simple_flush_all(struct vlist_simple_tree *tree);
+void vlist_simple_replace(struct vlist_simple_tree *dest, struct vlist_simple_tree *old);
+
+static inline void vlist_simple_update(struct vlist_simple_tree *tree)
+{
+       tree->version++;
+}
+
+static inline void vlist_simple_add(struct vlist_simple_tree *tree, struct vlist_simple_node *node)
+{
+       node->version = tree->version;
+       list_add(&node->list, &tree->list);
+}
+
+#define vlist_simple_for_each_element(tree, element, node_member) \
+       list_for_each_entry(element, &(tree)->list, node_member.list)
+
+#define vlist_simple_empty(tree) \
+       list_empty(&(tree)->list)
+
+
 #ifdef __linux__
 static inline int fls(int x)
 {